The All Blacks have sent for Crusaders wing Zac Guildford and Blues scrum-half Alby Mathewson as they count the cost of last weekend's brilliant 32-12 Tri-Nations win over South Africa in Auckland.

The duo will provide cover for wing Joe Rokocoko, centre Richard Kahui and No.9 Jimmy Cowan. Kahui is struggling with a shoulder injury after falling awkwardly, Rokocoko a minor hamstring strain and Cowan an abdominal strain.

Kahui has already been ruled out of the return match in Wellington on Saturday while Rokocoko and Cowan will be monitored closely in the coming days.

"Richard will have further medical tests on his shoulder this week to assess the seriousness of the injury but he will definitely be unavailable for the second Test," All Blacks coach Graham Henry said. "Also, with the injuries to Joe and Jimmy, we thought it prudent to bring in Zac and Alby as cover."

Guildford was a surprise omission from the Tri-Nations squad, having played a part in June Tests against Wales and Ireland.